{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/trimble-navigation/main/json-schema/trimble-navigation-position-schema.json",
  "title": "Trimble Navigation GNSS Position",
  "description": "A GNSS position fix from a Trimble receiver via Trimble Mobile Manager",
  "type": "object",
  "required": ["latitude", "longitude", "timestamp"],
  "properties": {
    "latitude": {
      "type": "number",
      "format": "double",
      "minimum": -90,
      "maximum": 90,
      "description": "Latitude in decimal degrees (WGS84)"
    },
    "longitude": {
      "type": "number",
      "format": "double",
      "minimum": -180,
      "maximum": 180,
      "description": "Longitude in decimal degrees (WGS84)"
    },
    "altitude": {
      "type": "number",
      "format": "double",
      "description": "Height above WGS84 ellipsoid in meters"
    },
    "speed": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "description": "Ground speed in meters per second"
    },
    "bearing": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "maximum": 360,
      "description": "Direction of travel in degrees from north (clockwise)"
    },
    "satellites": {
      "type": "integer",
      "minimum": 0,
      "description": "Number of satellites tracked in the position solution"
    },
    "hrms": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "description": "Horizontal Root Mean Square accuracy in meters"
    },
    "vrms": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "description": "Vertical Root Mean Square accuracy in meters"
    },
    "pdop": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "description": "Position Dilution of Precision"
    },
    "hdop": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "description": "Horizontal Dilution of Precision"
    },
    "vdop": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "description": "Vertical Dilution of Precision"
    },
    "diffStatus": {
      "type": "integer",
      "enum": [1, 2, 4, 5],
      "description": "GNSS solution type: 1=Autonomous, 2=DGPS, 4=RTK Fixed, 5=RTK Float"
    },
    "timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "GNSS position timestamp in UTC (ISO 8601)"
    },
    "satelliteView": {
      "type": "array",
      "items": { "$ref": "#/definitions/SatelliteInfo" }
    }
  },
  "definitions": {
    "SatelliteInfo": {
      "type": "object",
      "properties": {
        "id": { "type": "integer" },
        "elevation": { "type": "integer", "minimum": 0, "maximum": 90 },
        "azimuth": { "type": "integer", "minimum": 0, "maximum": 360 },
        "snr": { "type": "number", "format": "float" },
        "used": { "type": "boolean" },
        "gnssSystem": { "type": "string", "enum": ["GPS", "GLONASS", "Galileo", "BeiDou", "QZSS", "SBAS"] }
      }
    }
  }
}